Furnace refractory



Jun 2, 1925. 4 1,543,669

- I M. UNGER FURNACE REFRACTORY Filed May 16 19235 lnventovz Ma nus Ungev;

His Au owneg Pittsfield,. in'thefcounty of Berkshire, btatc. fire brick particles an' l zitented June 2, 1925.

Y 7 V 1,540,669? UNITED STATES, PATENT OFFICE.-

' menus mom or rmrsrmnmmssacnusm's, lemme T0 GENERAL mnc'rmc comm, A conromnon or :nEw 'gonx.

FURNACE msraii'croair. i

\ Application filed May is, 19.23. sernrm. 39,397.

To all wlwnt itvgnag cmwcm:

Be it known that I,- Maurine -U'x om, a citizen of the United States, residing at by the cement, When the particles are incorporated in the cement, more cement is introduced, followed b another quantity of so on untll the joint 6 of Massachusetts, haye'invente'd certain new or crevice is filled, asindicated at 1,2, 3, 4

and useful Tm ro vementsin Furnace Refractories, of w ich the following is a specification. j

,This application is a continuation in part of in}! prior application, Serial No. 554,577, filed April 18, 1922. 7 The present invention relates to the joining of ceramic articles, as foruaxample, the -partso'r"a:fnrnace linin and it comprises particularly a method of making joints between preformed members which will be capableof withstanding the severe conditions incidental to the operation'of a furnace.

W'hcn furnace parts consisting of fire clay. or'other refractory material, are-cemented to each other by ordinary ce ment, for example, fire clay, cracks develop through whzch leakage of fused--material may occur during operation of the furnace.

In accordance with my invention the pants of the furnace structure are cemented by filling the intervening spaces with a plastic cement and introducing therein particles of ceramic material of materially greater size than the fine cement particles and preferably being introduced dry to absorb exce$ itained.

- 'stantially unitary .eratmg' temperature of the furnace is at} As a cona quence a refractory of subwhich issubstantially free from cracks and fissures which mightfpermit the escape of moltcncharge.

That I claim as-newand desire to secure b Letters Patent of the United 1. The method of joining together prcformed parts of refractory material which consists inintroducing a refractory cement between the parts -to be joined and incorporating substantially dry particles of 11-- fractory material therein. 2. The method o fjoining together tin-d.

. shaped articles of clay to form a furnace structure which consists in introducing plas- Afterthoroughly d' ing the-mic Slatcs, is:

structure is produced tic clay betwecnthe surlaccs to be joillwl. then introducing partlclcs of'lircd ('l:\ into said cement, drying and gradually heating to the firing temperature of said clay to form a solid, unitary structnrcl 3. A furnace structure comprising a plu- .'moisture' from the cement; The large sized rality of preformed refractory members,

particles form a structure through' which cracks will not extend. v The accompanying; drawing is a vertical section of a furnace structure embodying my lpVBlltlOlL.

Myinvention is particularly applicable to the fabrication of containers or crucibles for induction furnaces from preformed parts of fire brick or'other suitable refractory matcrial. although my invention is not limited of cement, such as tire clay render-e lo the construction of this type of furnace.

in carrying out my invention a uantily plastlc by water-(is introduced between the parts a,

' b and 0 tube cemented in such quantity as inch mesh screen. As much of these particles should be added as will be taken up and a layer of refractory cemcnt'nniting said members containing imbcddcd 't-lltltln particles ofrefractory material which are of materially larger size than the pa l'ticl fs cunstituting said cement.

4. An induction furnace crucible comprising a plurality of preformed refractory members and layers of a refractory setting cement uniting said members containing im bedded particles of non-setting refractory material,

5. An induction furnace crm-il-lc comprising a plurality of preformed nn-mln-rsof lire brick and layers of plastic clay uniting .said members. said clay having ilnlu-ddi-d therein particles of fired clay about ,2; to 4,

inch in diameter, said crucible being mmvcrtiblc by firing to a unitary structure which is substantially frcc from lis.-un-.

In witness whereof, have hcrcnnl Wsi-t any band this l-lth day of May, 1923.

MAGNUS L'NG lift. 

